Controllable Preparation And Photonic Properties Of Organic Crystalline Micro/Nanostructures

In the modern development of information technology,nanophotonics has received more and more attention.It is hoped that controllable building of functionally oriented material structures and photonic components at the micro/nano scale will be made and that photonic integrated chips will be made,which is The singularity of the singularity of the singularity of the singularity of the singularity of the singularity of the singularity of the singularity of the singularity of the singularity of the singularity Due to the lack of understanding of the interaction between molecular structure,assembly process,morphology control and optical properties of materials,we have encountered great obstacles in the controllable construction of functionally oriented material structures and photonic components.This thesis is guided by photonics functional elements,selects approp Riat molecules,explores the law of self-assembly of molecular materials,and can control different micro-nano structures according to this law to construct new ideas for optical functional devices.The main contents of the paper are as follows:1.Based on the study of the self-assembly behavior of small organic molecules based on intermolecular forces,we selected two small molecules with different molecular structures.This difference in molecular structure makes the intermolecular weak interaction forces different,resulting in different final assembly structures.Due to the different micro-nanostructures,there are different transmission and confinement capabilities for light waves:1D organic nanowires not only limit the propagation of light in two dimensions,but also exhibit low loss optical waveguides;2D diamonds not only propagate dimensions limit light waves,but also exhibit excellent light transmission behavior within organic nanosheets.2.According to the synergistic assembly ability between molecules and the matching characteristics of their energy levels,we purposely selected a pair of energy to the acceptor molecule,and prepared DAAQ?BPEA dendrimer by solution drop casting and physical vapor deposition.Nanoheterojunction:The backbone is 9-10 diphenylethynyl ruthenium(BPEA)micron wire,branched as 1,5-diaminopurine(DAAQ)nanowires,BPEA is the nuclcation centeir of DAAQ epitaxial growth,prepared A dendritic heterojunction structure.When we use a 400 nm laser to excite the trunk of the heterojunction,the branch of the DAAQ?,BPEA heterojunction outputs different optical signals,which can realize the function of the photonic router.In summary,this thesis deeply studies the potential application of organic micro/nano materials in photonics.Through the understanding of the light propagation behavior and photochemical processes at the micro-nano scale,we rationally construct the micro-material structure to achieve the expected photonic function,which is organic.The design and application of optical functional materials provides a new idea.